XML 65 R53.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stockholders' Equity and Stock-Based Compensation - Textual (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Jun. 30, 2018
Jul. 01, 2017
Jun. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of options granted     0 0  
Closing stock price         $ 35.41
Intrinsic value of options exercised $ 0.6 $ 0.6 $ 1.1 $ 1.5  
Performance-Based Restricted Stock Units (PSUs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Percent of granted shares that will vest if target stock price performance is achieved     66.70%    
Maximum percent of granted shares that will vest if maximum stock price performance is achieved     100.00%    
Performance-Based Restricted Stock Units (PSUs) [Member] | Tranche One [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Period of vesting     1 year    
Performance-Based Restricted Stock Units (PSUs) [Member] | Tranche Two [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Period of vesting     2 years    
Performance-Based Restricted Stock Units (PSUs) [Member] | Tranche Three [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Period of vesting     3 years